Meta comment: When posting questions here, you should provide code in copy-paste-able form (instead of pictures). It's tedious to type it all out and make sure it's correct just to be able to reproduce the problem.

Have you read the documentation for Position? Nothing in there suggests that Position is a looping construct, so there is no reason to expect this to work by just adding {i,1,7} to the end of the expression.

Here is one way to achieve what I think you're trying to achieve. It's easier to break the problem up into small pieces, so let's start by creating the patterns you want to search for:

searchPatterns = Insert[#, _Integer, {{3}, {3}, {-1}, {-1}}] & /@ combinations1

{{1,0,_Integer,_Integer,0,1,_Integer,_Integer},{0,1,_Integer,_Integer,1,0,_Integer,_Integer},{1,0,_Integer,_Integer,0,0,_Integer,_Integer},{0,1,_Integer,_Integer,0,0,_Integer,_Integer},{0,0,_Integer,_Integer,0,1,_Integer,_Integer},{0,0,_Integer,_Integer,1,0,_Integer,_Integer},{0,0,_Integer,_Integer,0,0,_Integer,_Integer}}

Now we'll map Position over these patterns:

Position[level11, #] & /@ searchPatterns

{{{1}}, {{2}}, {{3}}, {{4}}, {{5}}, {{6}}, {{7}, {8}}}